[clpython-devel] RE: CLPython on LispWorks

[Jochen Schmidt]

Hello Willem,

I've tried to compile CLPython as you suggested in your message.
There were two problems I had to solve:

1) Incomplete Definition in core/csetup.lisp
The only Definition in this file was:

(defun py-raise (exc-type string &rest format-args)
   "Raise a Python exception with given format string"
   (if +exceptions-are-python-objects+
       (error exc-type :args (cons string format-args)))
   (error exc-type

I just closed the two open parens to get it compiling. If I understood  
the code right - the incomplete part of this function would not get  
taken by LispWorks anyways (because on LispWorks you did set  
+exceptions-are-python-objects+ to T).

2) Reader Problem in exceptions.lisp
There are two definitions for {Exception}, depending on the value of  
+exceptions-are-python-objects+. The decision which of the definitions  
applies is done by a reader-conditional which is setup within the same  
EVAL-WHEN like the definitions themselves; this means that the  
definitions are already through the reader before you push :exceptions- 
are-python-objects on *features*. The solution is to split the EVAL- 
WHEN form into two: One to push :exceptions-are-python-objects on  
*features* and the second one with the definitions of {Exception}.  
Actually I think the {Exception}-Definition wouldn't have to be within  
an EVAL-WHEN at all.

After this two points CLPython compiles through and it seems to run -  
impressive!

I've run your test-suite and the only failure was this one:

Test failed: known failure: (CLPYTHON.PARSER:PARSE "def f(a=3,): pass")
Reason: detected an unexpected error of type `#<CLPYTHON::PY-TYPE  
CLPYTHON.USER.BUILTIN.TYPE.EXCEPTION:|SyntaxError| 21A26D3B>':
         SyntaxError: Parse error at line 1, at token `)'.
                      Expected one of: `(' `identifier' `*' `**'.
                      [Internal error #<YACC:YACC-PARSE-ERROR  
200FC37F> caught due to CLPYTHON.PARSER::*CATCH-YACC-CONDITIONS*]

Which - as I understood the message - is a already known problem.

Again: CLPython is a really impressive bit of work! Thanks for sharing  
it with us.

ciao,
Jochen Schmidt


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Jochen Schmidt
CRISPYLOGICS
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